QUDOS - the brilliant new amplifier boards from Avondale + HCR200
- Thread starter Marra
- Start date
misterc6
Wasted and wounded, it ain’t what the moon did
The HCR200 is designed to replace the regulator boards found in NAP250 and NAP135 amplifiers. As such each HCR200 powers one NAPA (or NCC200 or Qudos) board but you need to bear in mind that the transformers in the 135 & 250 have higher voltage outputs than those used in the other models because of the voltage drop across the regulator board.
laverda
pfm Member
I'm not using the HCR to power the whole board at this stage, just the front end, a 40-0-40 trani would fit the bill. I could try VBE's too as in a Voyager as I have a couple ready built knocking about somewhere.
divedeepdog
pfm Member
Yes, designed to replace the reg board in 250's /135's, Les put it in the front end of my Voyager, I'm very happy.
laverda
pfm Member
Very pleased to hear that....
divedeepdog
pfm Member
Les built them, i had a diy voyage clone which I put VBE's in (from the GB), so I can't comment on direct comparison, (it was sold before the build) however the difference between mono NCC200 1.4 to Voyager with HCR front end isn't subtle.
As always there's lots of contributing factors, huge transformers and beautiful build that deserves a perspex lid to put it on view...
Ok thanks, that's a nice 301 you have there in your picture have a 401 myself.
laverda
pfm Member
Ive started this thread as a sequal to the original QUDOS thread which has gone astray from the original intent. Here is a starter for 10, how to extract the max from the NCC220 with the additions of regs....
Or the application of regs front, back or both to the NCC200 or indeed the NCC220 (QUDOS).
Having had a look at the NCC300 (photo) Les has in development we notice there are on board regs for the VAS which can also be linked to supply the power out stage. (I think) advice if you see other.)) used just as a reg for the front end and spades available for a conventional +- PSU to the outputs.
NCC300 are not available as yet so looking to reg up the NCC220 ...would it be worth the effort and or cost...??
Or the application of regs front, back or both to the NCC200 or indeed the NCC220 (QUDOS).
Having had a look at the NCC300 (photo) Les has in development we notice there are on board regs for the VAS which can also be linked to supply the power out stage. (I think) advice if you see other.)) used just as a reg for the front end and spades available for a conventional +- PSU to the outputs.
NCC300 are not available as yet so looking to reg up the NCC220 ...would it be worth the effort and or cost...??
divedeepdog
pfm Member
I don't know the values, but the voltage is usually higher on the front end.
Although I've only compared NCC200, the difference between mono 110's and Voyager configuration isn't smal
Although I've only compared NCC200, the difference between mono 110's and Voyager configuration isn't smal
337alant
Negatively Biased
The front end only requires a quiet constant current supply so the HCR 200 seems a little overkill for such a small demand, original NCC200 was only arround 20ma not sure what the new Qudos draws.
Of course it doesent matter if the supply is capable of much more as long as the supply is low noise.
Guess that's why Les chosen a simple but effective on board reg for the NCC300
Of course it doesent matter if the supply is capable of much more as long as the supply is low noise.
Guess that's why Les chosen a simple but effective on board reg for the NCC300
Jo Sharp
Pulls on doors marked push
Yes, but unfortunately the forum tools don't allow me to change the sequence of posts when splitting them out of the original Qudos thread.